Abstract
A truncated sine waveguide slow wave structure (SWS) is proposed for the wideband high-power terahertz traveling-wave tube (TWT). The slow-wave characteristics including the dispersion properties and interaction impedances have been investigated by the simulation method. Compared to the sine waveguide, the average interaction impedance of the truncated sine waveguide is increased by 31.1% at 0.22THz. Meanwhile, the transmission properties of the truncated sine waveguide SWS is as excellent as the sine waveguide from the calculations.
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